ad blue MERCEDES-BENZ S55AMG 2003 W220 Owner's Manual

110 Controls in detailSeatsSeat ventilation*
The switch is located on the door. Seat
ventilation can be activated manually with
the SmartKey in starter switch position1
or2 (
page 31) or by the summer open-
ing feature (
page 190).
The blue indicator lamps on the switch
show the ventilation level selected:
1Seat ventilation switch

Make sure the ignition is switched on.
All lamps in the instrument cluster light
up.
Switching on seat ventilation

Press switch1.
Three blue indicator lamps above the
switch light up.
Continue pressing switch until the de-
sired seat ventilation level is reached.Switching off seat ventilation

Press switch1 repeatedly until all indi-
cator lamps go out.
Level3
Three indicator lamps lit
2
Two indicator lamps lit
1
One indicator lamp lit
off
No indicator lamp lit
iThe seat ventilation is automatically set
to the highest level if activated via sum-
mer opening feature (
page 190).
!If one or all of the lamps blink on the
seat ventilation switch, there is insuffi-
cient voltage since too many electrical
consumers are switched on. The seat
ventilation switches off automatically.
The seat ventilation will switch back on
again automatically as soon as suffi-
cient voltage is available.

177 Controls in detail
Automatic climate control
Setting the temperature
Use temperature controls (
page 175)
10for the left side or8 for the right side to
separately adjust the air temperature on
each side of the passenger compartment.
You should raise or lower the temperature
setting in small increments, preferably
starting at 72°F (22°C).
Increasing / decreasing

Press button 10 or 8 repeatedly until
the display shows the desired tempera-
ture.
The automatic climate control system
will correspondingly adjust the interior
air temperature.Adjusting the temperature for center
air vents
When outside temperatures are low, you
can manually raise the air temperature for
the center and side air vents.
Thumbwheel4 is located between the cen-
ter air vents (
page 174).
Automatic temperature control

Turn thumbwheel 4 to A.
The indicator lamp above the thumb-
wheel lights up. The temperature is au-
tomatically adjusted to the set value.Turning on warm air

Turn thumbwheel 4 in the direction of
the white marking.
Warm air will enter from the center air
vent.
Turning on cooler air

Turn thumbwheel4 in the direction of
the blue marking.
Cooler air will enter from the center air
vent.
iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.